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Old 14th January 2013, 02:32 AM   #21
6L6 is offline 6L6  United States
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Quote:
Originally Posted by duder1982 View Post
I take it Tea-bag is the forum member putting the boards together, but what does it mean to be convertible.
It can make a few different versions of the F5Turbo

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Yes tell me about, my head hurts.
There is no wrong answer, especially when you have 104db speakers.

Research now.

Build the ACA. Listen to it. (You will love it...)

Then once it's done and you are ready to do the next project, decide on which one, and go for it!
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Old 14th January 2013, 11:44 AM   #22
billyk is offline billyk  United States
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What 6L6 said... good advice.

Just to add to your head spinning...
buzzforb may have a F5 turbo Premium kit or two left available from his most recent group buy, it's a nice kit with matched output devices for a nice price. Worth a PM to see. And it looks like TeaBag does have a few boards available at this time.
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Old 14th January 2013, 01:45 PM   #23
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So contact Teabag for some boards to make a dual output F5, then contact buzzforb to get the premo kits to stuff these boards, then get a tranny, chassis a few other parts and heat up the soldering iron. Oh I guess I would need a PSU as well, we'll get to that point here shortly.
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Old 14th January 2013, 02:14 PM   #24
6L6 is offline 6L6  United States
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Get a pre-drilled Chassis from the DIY audio store. You can use it for other projects as well later.

There is a million ways to skin the PSU cat... Do you want a PCB or are you going the route of perfboard and/or point to point?

A 400 or 500VA 18v+18 transformer will give you lots of flexibility down the road, and stay mechanically quiet.

Check your email.
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Old 14th January 2013, 02:47 PM   #25
billyk is offline billyk  United States
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Well... If buzzforb has any kits left, they can come with PSU components and a PSU board too. All you would need is the chassis and transformer plus a few bits here and there.
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Old 14th January 2013, 04:31 PM   #26
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As this will be one of my first builds, I will be trying to make things easier. So I will be looking at the pre-drilled chassis from the diystore, though I must say it with my mechanical knowledge it doesn't look like it would take that much to make one. I will all so stick a pcb for the psu, as it to will make things easier. I have contacted both buzzforb and tea-bag as they are both waiting on new stock to arrive.

But as I read through the 3 threads on the f5/f5turbo and another thread or so. It brings up more questions, like what do they mean when they are talking about rails and rail voltages.
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Old 14th January 2013, 05:12 PM   #27
billyk is offline billyk  United States
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This is the part I am learning about too so I hope someone will check me if I misspeak. The rails are what is referred to as the power supplied from the PSU to the output section. and there is a + Positive and a - Negative rail as referenced to ground.. The rail voltage is determined by the secondary voltage of the transformer and applying a math. I don't know detailed calculations, AndrewT and others are the ones for that. But basically it is secondary voltage multiplied by 1.41 for AB and 1.3 for class A. The F5t V2 I am constructing will have 25 volt secondaries that should yield 32 - 32.5 volt rails.
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Old 14th January 2013, 09:00 PM   #28
6L6 is offline 6L6  United States
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^^ You are fundamentally correct.
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Old 14th January 2013, 10:16 PM   #29
billyk is offline billyk  United States
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Originally Posted by 6L6 View Post
^^ You are fundamentally correct.
Fundamental is good for now, thanks!
I am really trying hard to get beyond the board stuffer stage and understand what I am doing and why. That is one of the great things about Nelson's stuff like the ACA, and the great documentation that goes with it. Not to mention all the info to be had here.
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Old 5th March 2013, 11:11 PM   #30
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Man, no f5t boards yet, no kits, and now no chassis. man oh man.
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